Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cham van ho snippets" » "pham van ho snippets", "cham va ho snippets", "chao van ho snippets", "cham van hoa snippets", "cham van hoc snippets", "cham van hoe snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("cham van ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cham van ho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cham van ho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cham van ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.